Internet error codes

Here are some error code.Sometimes you might see these code in your browser.Check the list the below to understand wwhat its mean.

100-199 - Information Codes. Provide information about the request or
                 the servers involved.

200-299 - Success Codes. Indicate that the request was accepted or the
                 requested file has no content

300-399 - Redirects. Requested content has moved.

400-499 - Client Errors. Cannot find content or you don't have the correct
                 permissions to access it.

500-599 - Server Errors. There is a problem at the server end stopping the
                 request from completing successfully.

Bad request 400
                The request could not be understood by the server due to bad syntax.
                You should not repeat the request without modifications.

Unauthorized 401
                 The creators of a Web page may want only certain people have
                 access to that page. You should only retry the request if you know
                 that you have authorization.

PaymentRequired 402
                  This message gives a specification of charging schemes which are
                   acceptable. You may retry the request with a suitable ChargeTo
                   header.

Forbidden 403
                  The request is for something forbidden. Authorization will not help.

Not found 404
                  The server has not found anything matching what you requested.
                  Make sure that the Web address (URL) that you typed in exactly
                  matches the address you were given

405 Method Not Allowed
                  The method specified in the Request-Line is not allowed for the
                  resource identified by the request

406 Not Acceptable
                 The resource identified by the request is only capable of generating
                 response entities which have content characteristics not acceptable
                 according to the accept headers sent in the request.
       
407 Proxy Authentication Required
                This code is similar to 401 (Unauthorized) , but indicates that
                you must first authenticate yourself with the proxy.

408 Request Timeout
                 The client did not produce a request within the time that the
                 server was  prepared to wait. You may repeat the request
                 without modifications at any later time.

409 Conflict
                The request could not be completed due to a conflict with the
                 current state of the resource.

410 Gone
                 The 410 response is primarily intended to assist the task of web
                  maintenance by notifying the recipient that the resource is
                 intentionally unavailable and that the server owners want remote
                 links to that resource be removed.

411 Length Required
                 The server refuses to accept the request without a defined
                 Content- Length.

412 Precondition Failed
                 The precondition given in one or more of the request-header
                  fields evaluated to false when it was tested on the server.

413 Request Entity Too Large
                 The server is refusing to process a request because the request
                 entity is larger than the server is willing or able to process.

414 Request-URI Too Long
                 The server is refusing to service the request because the
                 Request-URI is longer than the server is willing to interpret.

415 Unsupported Media Type
                 The server is refusing to service the request because the entity
                 of the request is in a format not supported by the requested
                 resource for the requested method.

Internal Error 500
                 The server encountered an unexpected condition which
                 prevented it from fulfilling the request.

Not implemented 501
                 The server does not support the functionality required to
                 fulfill the request.

502 Bad Gateway
                 The server, while acting as a gateway or proxy, received
                 an invalid response from the upstream server it accessed
                 in attempting to fulfill the request.

503 Service Unavailable
                 The server is currently unable to handle the request due to
                 a temporary overloading or maintenance of the server.

504 Gateway Timeout
                 The server, while acting as a gateway or proxy, did not
                 receive a timely response from the upstream server it
                 accessed in attempting to complete the request.

505 HTTP Version Not Supported 
                 The server does not support, or refuses to support, the
                  HTTP protocol version that was used in the request message.

Now you can understand your problem.